13005560 has 32 divisors (see below), whose sum is σ = 29378160. Its totient is φ = 5181696.

The previous prime is 13005539. The next prime is 13005563. The reversal of 13005560 is 6550031.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13005563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13412 + ... + 14348.

Almost surely, 2^13005560 is an apocalyptic number.

13005560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13005560 is an abundant number, since it is smaller than the sum of its proper divisors (16372600).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13005560 is a wasteful number, since it uses less digits than its factorization.

13005560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1295 (or 1291 counting only the distinct ones).

The product of its (nonzero) digits is 450, while the sum is 20.

The square root of 13005560 is about 3606.3222263131. The cubic root of 13005560 is about 235.1669855862.

Adding to 13005560 its reverse (6550031), we get a palindrome (19555591).

The spelling of 13005560 in words is "thirteen million, five thousand, five hundred sixty".